PHOENIX, 21 Mar 2015 (AFP) - Jang was 11-under for the tournament, inching ahead of clubhouse leader Kim Hyo-Joo, who carded a three-under 69 in the second round for a 10-under total of 134.
Stacy Lewis, who led by one when the first round was completed earlier Friday, managed a one-under 71 in the second round to share third place on nine-under 135.
Kim Kaufman, who was three-under par through 12 holes of her second round at Wildfire Golf Club was also nine-under for the tournament.
France's Karine Icher (70) and South Koreans Lee Mi-Hyang (66) and Lee Il-Hee (67) were tied for fifth on eight-under 136.
Defending champion Karrie Webb posted a second-round 70 to head a group of four players to complete two rounds at seven-under 137.
Seven more players, including world number one Lydia Ko, were still on the course at seven-under when play was halted.
New Zealand's Ko held a share of the clubhouse lead when the first-round was suspended on Thursday night. The tournament had fallen behind because of a four-hour weather delay on Thursday morning.
Ko was overtaken by Lewis, who had nine birdies in her eight-under first-round effort.
Lewis said she couldn't be too disappointed that she didn't continue that torrid pace in her second round.
"I made nine birdies -- it's always hard to follow that," she said. "And I knew that going into it that it was going to be tough.
"I didn't do too much different other than I just got on the wrong side of the hole... still under par. So I mean, I'm right there."
For clubhouse leader Kim, it was a long day. She played the last 12 holes of a first-round 65, then had four birdies and one bogey in her second-round 69.
"Last night I was worried about doing 30 holes," said Kim, but added it wasn't as difficult as she had feared.
"Good weather in Arizona, so I didn't feel tired because of the weather," she said.
The second round was to resume on Saturday morning, with the third round to follow.